Beyond the (log)book: Comparing accelerometer non-wear detection techniques in toddlers

Background Accelerometers are increasingly used to measure physical activity and sedentary time in toddlers. Data cleaning or wear time validation can impact outcomes of interest, particularly in young children who spend less time awake. However, no study has systematically compared wear time validation strategies in toddlers. As such, the objective of this study is to compare different fully-automated methods of distinguishing wear and non-wear time (counts and raw data algorithms) to the semi-automated (counts with logbooks) criterion method in toddlers.